Note on "RVG" Pressings of Blue Note Records

As Robert May mentions here, many later issues of Blue Notes, even from the 1970s, have "RVG" or "Van Gelder" stamped into the run-off vinyl. These are more collectible, and they typically sound a lot better than the ones that do not have these markings. My suspicion is that these records are pressed using stampers that derive from the original mastering session, when the record was first released.